A day after heartsick New Yorkers buried the battered body of little Nixzmary Brown, officials here and in Albany were scrambling to fix the broken child-care bureaucracy and strengthen the penalties facing child-torturing murderers.

In the state capital, Assembly Speaker Sheldon Silver – citing the death last week of the Bed-Stuy 7-year-old and the recent abuse-related deaths of three other youngsters known to city authorities – called a hearing for Feb. 8 aimed at identifying exactly what has gone wrong.

And in Brooklyn, Assemblywoman Nettie Mayersohn (D-Queens) said she’ll introduce a bill to put sadistic child-killers behind bars for life, without any hope of parole.

Silver (D-Manhattan) said two Assembly committees would conduct a joint special hearing in Manhattan.

He said they expect to hear testimony from representatives of the city’s Administration for Children’s Services and the state Office of Children and Family Services.

Nixzmary’s stepfather, Cesar Rodriguez, and her mother, Nixzaliz Santiago, face second-degree murder raps in the case of the malnourished second-grader. If convicted, they could be out of prison after 25 years.

Mayersohn’s bill would create a new charge of “aggravated murder of a child.”

“Unfortunately, it’s too late for little Nixzmary, but we hope the passing of this legislation [will] . . . act as a deterrent,” Mayersohn said.